ISL54064EVAL1Z Datasheet ISL54060EVAL1Z, ISL54059EVAL1Z, ISL54063EVAL1Z | P1-P3

AN1369.0

ISL54059EVAL1Z Through ISL54064EVAL1Z

Evaluation Board User’s Manual

Description

The ISL54059EVAL1Z, ISL54060EVAL1Z,

ISL54061EVAL1Z, ISL54062EVAL1Z, ISL54063EVAL1Z

and ISL54064EVAL1Z evaluation board is designed to

provide a quick and easy method for evaluating the

ISL54059 through ISL54064 ICs.

The ISL54059 and ISL54062 ICs are a single supply Dual

Single-Pole Double Throw (SPDT) analog switches while the

ISL54060, ISL54061, ISL54063 and ISL54064 IC’s are

single supply Dual Single-Pole Single Throw (SPST) analog

switches. All devices feature negative swing capability,

sub-

Ω ON-resistance, and low power dissipation. The ICs

are designed for applications that require an analog switch

that may see voltages below ground at the switch terminals,

such as audio and video. The evaluation board is developed

to evaluate the ISL540XX ICs, integrating many features for

ease of use in examining the performance of the device

under various operating conditions. To help understand the

operation of the ISL540XX IC and the ISL540XXEVAL1Z

evaluation board, it is recommended to study the evaluation

board schematic found on page 4 of this document and the

datasheet for the IC under evaluation.

The ICs are analog switches that are capable of swinging

down to 6.5V below the positive supply rail. For example, if

the supply is at +1.8V, the switch terminal analog operating

range is from -4.3V to +1.8V. The ISL54062, ISL54063, and

ISL54064 also integrate Click and Pop Elimination Circuitry

to remove transient noises at the speaker during power

ON/OFF of an audio system. The evaluation board contains

standard RCA/BNC connectors and a single headphone jack

to allow the user to easily interface with the IC to evaluate its

functions, features, and performance.

This application note will guide the user through the process

of configuring and using the evaluation board to evaluate the

ISL540XX devices.

Key Features

• RCA Audio Input/Output Jacks, Stereo Headphone Output

Jack and BNC Connectors

• Convenient Test Points and Connections for Test

Equipment

• Click and Pop Elimination Circuitry (ISL54062, ISL54063,

and ISL54064)

• Manual or External Logic Input Control

Picture of Evaluation Board (Top View)

Board Architecture/Layout

Basic Layout of Evaluation Board

A picture of the evaluation board is located in Figure 1. The

ISL540XX IC is located inside socket U1 located at the

center of the evaluation board. The IC needs to be

orientated inside the socket such that the pin 1 indicator on

the IC is aligned with the pin 1 indicator dot inside the

socket. The evaluation board integrates the necessary

connections and components to interface with the ICs for

ease of operation.

Power Supply

The ISL540XX IC requires a supply voltage in the range of

+1.8V to +6.5V for proper operation. Banana jacks for V

(J1) and GND (J2) are located at the top of the board. The

evaluation board contains a 10µF bulk capacitor and a 0.1µF

high frequency decoupling capacitor at the supply lines.

Logic Control

The evaluation board contains two types of logic control to

the digital logic inputs of the IC available to the user. The

logic pins can be controlled either through manual or

external operation. The logic control pins are manually

toggled by the SPST switches mounted on the evaluation

board (S1-S2). When the switch is in the up position (H), the

associated logic pin is pulled to V

for logic HIGH. When

the switch is in the down position (L), the associated logic

pin is pulled to GND for logic LOW. For manual operation,

the jumpers JP6-JP7 need to be in the 2-3 position.

For external control via a function generator or switched

source, set the jumpers JP6-JP7 in the 1-2 position. This

by-passes the SPST switches and routes the logic control to

FIGURE 1. ISL54059EVAL1Z THROUGH ISL54064EVAL1Z

EVALUATION BOARD

Application Note February 3, 2009

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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AN1369.0

February 3, 2009

the BNC connectors J13-J14 located on the bottom right side

of the board.

Note: There are 500k

Ω logic pull-down resistors on the INx

control pins. In external control mode when the digital logic

input lines are left in a floating state, these pull-down resistors

bias the logic inputs to ground.

Switch Terminals

The evaluation board contains components to interface with

all six terminals of the Dual SPDT switch (four terminals for

the SPST switches). The common (COM) terminals of the

switch are located on the right side of the evaluation board.

The Normally Open (NO) and Normally Closed (NC) terminals

of the switch are located on the left side of the evaluation

board. All switch terminals include both RCA jacks and BNC

connectors. The COM terminals also include a headphone

jack (HJ1) for connecting a stereo headphone or line level

plug.

Note: There are 10kΩ pull-down resistors on the NCx and

NOx pins of the evaluation board (R21, R22, R23, and R26).

They will need to be depopulated if the user does not desire to

have them.

Refer to Table 1 for a list of the connections on the

ISL540XXEVAL1Z and the associated pin of the IC. The

evaluation board also includes Test Points for convenient

locations to probe specific pins on the IC.

TABLE 1. BOARD COMPONENT TABLE

Note: All switch terminals on the evaluation board have

place holders that can have surface mounted components

placed either in series with the switch path or shunted to

ground. Jumpers on these components allow flexible

configurations. Refer to the Evaluation Board Schematics

located on page 4 for clarification.

Power Supply

The DC power supply connected at banana jacks J1 (V

)

and J2 (GND) provides power to the evaluation board. The

evaluation board requires a +1.8V to +6.5V DC power

supply for proper operation. The power supply should be

capable of delivering 100µ

A of current.

Logic Control

The state of the ISL540XX IC is determined by the Truth

Table as defined in their respective datasheet. When in

manual operation mode, the logic being toggled by the

SPST switches (S1-S2) will always drive the voltage of the

logic pin to V

for a HIGH and GND for a LOW. In external

control mode, the voltages being driven by an external

source must meet appropriate V

and V

levels as defined

in the datasheet.

The control pins are 1.8V logic compatible up to a +3.3V

supply, which allows for control via a standard µcontroller.

Logic “0” (LOW) when ≤ 0.5V (or floating)

Logic “1” (HIGH) when ≥1.4V

When operating above +3.3V supply, refer to the datasheet

for appropriate logic levels to drive the logic pins. It is always

recommended to drive the logic pins to the positive supply

rail (V

) and GND to minimize power consumption.

Logic States

INPUT SELECT (INX) PINS

If the INx Pins are logic “HIGH”, then the NOx switches are

turned ON and the NCx switches are turned OFF. If the INx

Pins are logic “LOW”, then the NCx switches are turned ON

and the NCx switches are turned OFF.

CLICK AND POP OPERATION (ISL54062, ISL54063,

ISL54064 ONLY)

Single supply audio sources are biased at a DC offset that

generates transients during power ON/OFF of the audio

source. This DC offset is coupled through a blocking

capacitor that is need to remove the DC bias to the speaker,

causing a transient voltage at the load. For example, when

the source is OFF and suddenly turned ON with a DC offset,

the capacitor will develop a voltage equal to the DC offset.

This voltage gets discharged by the speaker causing a click

and pop noise. The ISL54062, ISL54063, and ISL54064 ICs

integrate circuitry to eliminate click and pop noises to the

speaker.

For proper operation of Click and Pop elimination, the switch

terminal that is being connected to the speaker should be

connected through the integrated shunt resistor before

DEVICE

EVALUATION BOARD

CONNECTION

TEST

POINT

APPLICABLE

J1 TP1 All

GND J2 TP2 All

IN1 S2, J13 TP8 All

IN2 S1, J14 TP9 All

NO1 J11, J12 TP7 ISL54059,

ISL54060,

ISL54062,

ISL54063

NC1 J5, J6 TP4 ISL54059,

ISL54061,

ISL54062,

ISL54064

COM1 J3, J4, HJ1 TP3 All

NO2 J15, J16 TP10 ISL54059,

ISL54060,

ISL54062,

ISL54063

NC2 J7, J8 TP5 ISL54059,

ISL54061,

ISL54062,

ISL54064

COM2 J9, J10, HJ1 TP6 All

Application Note 1369

Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to

verify that the Application Note or Technical Brief is current before proceeding.

For information regarding Intersil Corporation and its products, see www.intersil.com

AN1369.0

February 3, 2009

connecting to the load. This allows any transients generated

by the source to be discharged through the shunt resistor

first, eliminating any audible click and pop noises. With a

typical DC blocking capacitor of 200µF and the shunt

resistance having a typical value of 140Ω, allowing a 250ms

dead time in for discharging a transient will eliminate the

click and pop noise.

Applications

The ISL540XX ICs are designed to be a Dual SPDT or

SPST switch for multiplexing or switching of signals that

require low insertion loss, low power consumption, and

negative voltage swing capability. Such applications include

Audio/Video equipment, battery or portable devices and

medical equipment. In addition, the Click and Pop

Elimination Circuitry makes it ideal for portable audio such

as MP3 players and cell phones.

Using The Board (Refer to Figure 2)

Lab Equipment

The equipment, external supplies and signal sources

needed to operate the board are listed below:

1. +1.8V to +6.5V DC Power Supply

2. Audio Signal Generator

3. Audio Signal Oscilloscope

4. Logic Control Generator and/or Pulse Generator

Initial Board Setup Procedure

1. Attach the evaluation board to the DC power supply at J1

) and J2 (GND). Positive terminal at J1 and negative

terminal at J2. The supply should be capable of delivering

+1.8V to +6.5V and 100µA of current.

2. Connect the Audio Source Signal to the NOx or NCx BNC

inputs . The analog input voltage range can be from

-6.5V up to V

3. Connect the Audio Signal Oscilloscope to the COMx BNC

outputs .

4. Connect the Logic Control generator to the INx logic

inputs.

NCx Switches Active

1. Drive the INx pins to logic “LOW”.

2. The NCx switches are now connected to the COMx

terminals (ISL54059, ISL54061, ISL54062, and

ISL54064 only).

3. The NOx switches have shunt resistors on the terminals

to ground (ISL54062 and ISL54063 only).

NOx Switches Active

1. Drive the INx pins to logic “HIGH”.

2. The NOx switches are now connected to the COMx

terminals (ISL54059, ISL54060, ISL54062 and ISL54063

only).

3. The NCx switches have shunt resistors on the terminals

to ground (ISL54062 and ISL54064 only).

FIGURE 2. BASIC EVALUATION TEST SETUP BLOCK DIAGRAM

+1.8V TO +6.5V

DC POWER

SUPPLY

AUDIO SOURCE

SIGNAL

LEFT

RIGHT

LOGIC CONTROL

AUDIO SIGNAL

OSCILLOSCOPE

CHA

CHB

Application Note 1369

P1-P3 P4-P4

ISL54064EVAL1Z

Mfr. #:

Buy ISL54064EVAL1Z

Manufacturer:

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Description:

Switch IC Development Tools ISL55007IEZ IF GAIN BLK900-2200MHZ;75OHM

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